Six bells commence tolling together and toll at intervals of 2, 4, 6, 8 10 and 12 seconds respectively. In 30 minutes, how many times do they toll together?
L.C.M. of 2, 4, 6, 8, 10, 12 is 120.
So, the bells will toll together after every 120 seconds (2 minutes).
In 30 minutes, they will toll together 30/2 + 1 = 16 times.
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If a person walks at 14 km/hr. instead of 10 km/hr., he would have walked 20 km more. The actual distance travelled by him is: |
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M and N entered into partnership with capitals in the ratio 4: 5. After 3 months, M withdrew of his capital and N withdrew 1/5 of his capital. At the end of 10 months, the gain was Rs. 760. What is Ms share in the profit? |
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In a test, sixty percent students passed in Maths and 65% in History, 40% passed in both of these subjects. If 90 students failed in maths and history both, then what is the total number of students? |
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Mr. Kaushik invested an amount of Rs. 13,900 divided in two different schemes A and B at the simple interest rate of 14% per annum and 11% per annum respectively. If the total amount of simple interest earned in 2 years be Rs. 3508, what was the amount invested in Scheme B? |
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